Method and apparatus for enhancing heat transfer in a combustor liner for a gas turbine
AssigneeGeneral Electric Company
InventorsRobert Alan Johnson, Anthony Joseph Loprinzo, Ching-Pang Lee, Nesim Abuaf, Wayne Charles Hasz, Harmon Lindsay Morton
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Abstract
A combustor liner is provided on its backside cooling surface with a braze alloy coating and cooling enhancement material, preferably metallic particles to enhance the heat transfer between the liner and the cooling medium. The surface area of the backside coated area is increased substantially by the coating and particles in relation to the uncoated surface areas. Consequently, the life of the liner is extended.
Claims17
A method of enhancing heat transfer between one surface of a combustor liner for a gas turbine and a cooling medium along said one surface wherein a second surface of said liner opposite said one surface is exposed to hot gases of combustion comprising the step of:
- applying a coating on said one surface of said combustor liner to form an overlying coated surface having a coated surface area in excess of a surface area of said one surface uncoated to afford enhanced heat transfer between said one coated surface of the combustor liner and the cooling medium relative to heat transfer between said one uncoated surface of the combustor liner and the cooling medium.
A method of enhancing heat transfer between one surface of a combustor liner for a gas turbine and a cooling medium along the one surface wherein a second surface of said liner opposite said one surface is exposed to hot gases of combustion, the combustor liner including at least a pair of generally annular ribs spaced from one another and projecting in a direction away from said second surface, said ribs defining a generally annular and generally smooth area therebetween comprising the steps of:
- providing a brazing sheet having cooling enhancement material and
- fusing the brazing sheet along the one surface to one of said pair of ribs and said annular smooth area between said ribs such that said cooling enhancement material is bonded thereto.
A combustor liner having a cooling surface and an opposite surface for exposure to a high temperature fluid medium comprising:
- a coating overlying said cooling surface forming a coated surface having a coated surface area in excess of said surface area of said cooling surface uncoated to afford enhanced heat transfer from the combustor liner to a cooling medium along the coated surface relative to the heat transfer from the combustor liner to the cooling medium without the coating.
Dependencies are inferred from the claim text.